Animals can possess rights if they have morally significant interests, while non-living things can hold rights only under broader or legally constructed accounts. The answer depends on the theory of rights applied.
A right is a justified claim that places corresponding duties on others. Under the interest theory of rights, a being can hold rights when protecting its interests justifies duties. Sentient animals experience pain and pleasure, so their interest in avoiding suffering may ground rights against cruelty, even though they cannot claim those rights themselves.
Under the will theory of rights, a right-holder must be capable of controlling or choosing whether another person’s duty is enforced. Most animals, plants, ecosystems, and objects cannot do this, so they cannot possess rights in the strict will-theory sense. A representative may exercise legal powers for them, but this does not establish independent moral rights.
| Case | Argument for rights | Main objection |
|---|---|---|
| Sentient animals | Their capacity to suffer gives them moral status. | They may lack autonomy or rational agency. |
| Ecosystems, rivers, or species | Rights may protect continued existence and intrinsic value. | They may lack consciousness or interests of their own. |
| Ordinary objects | Laws can protect culturally significant objects. | Protection usually reflects human interests rather than the object's own rights. |
A crucial distinction is between moral rights and legal rights. A river may be recognized as a legal person without being conscious, while an animal may have a moral claim against suffering even where law grants no corresponding right.
A common misconception is that holding rights requires fulfilling duties. Infants cannot fulfil duties but remain right-holders, so reciprocity is not necessary.
In IB Philosophy, define “rights,” compare interest and will theories, and apply each. Conclude specifying which entities have rights, what kind of rights they have, and under which account.
